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NOTE: Most of the High Level Science Products are unavailable while unscheduled maintenance is being performed. They will be incrementally restored over the course of this week. We apologize for any inconvenience.

HST/NICMOS Paschen-α Survey of the Galactic Center

Wang et al. recently carried out the first wide-field hydrogen Paschen-α line imaging survey of the Galactic Centre using the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) instrument aboard the Hubble Space Telescope (program 11120). The survey maps out a region of 2253 pc2 (416 arcmin2) around the central supermassive black hole (Sgr A*) in the 1.87 and 1.90 μm narrow bands with a spatial resolution of 0.01 pc (0.2 arcsec full width at half-maximum) at a distance of 8 kpc

Two relevant papers describe the project, data reduction and products:
HST/NICMOS Paschen-α Survey of the Galactic Centre: Overview Q.D. Wang et al. 2010, MNRAS 402:895
HST Paschen-alpha Survey of the Galactic Center: Data Reduction and Products H. Dong et al. MNRAS 417:114.

Explore the images with the HLA Interactive Display.


hlsp_hpsgc_hst_nicmos-nic3_gc_f187n_v1_img.fits -- The F187N mosaic in unit of uJy/pixel
hlsp_hpsgc_hst_nicmos-nic3_gc_f190n_v1_img.fits -- The F190N mosaic in unit of uJy/pixel
hlsp_hpsgc_hst_nicmos-nic3_gc_palpha_v1_img.fits -- The palpha mosaic in unit of uJy/pixel

Source catalogs
source catalog hlsp_hpsgc_hst_nicmos-nic3_gc_v1_palpha_catalog.fits -- P-α source catalog


These data may be downloaded at or
via anonymous ftp at path /pub/hlsp/hpsgc.